By way of an introduction to this issue of e-flux journal, I would like to discuss the changes in our understanding and perception of art engendered by conceptual art practices of the 1960s and 1970s, focusing not on the history of conceptual art or individual works, but rather on the ways in which the legacy of these practices remains relevant for us today.I would argue that from today’s perspective, the biggest change that conceptualism brought about is this: after conceptualism we can no longer see art primarily as the production and exhibition of individual things—even readymades. However, this does not mean that conceptual or post-conceptual art became somehow “immaterial.” Conceptual artists shifted the emphasis of artmaking away from static, individual objects toward the presentation of new relationships in space and time. These relationships could be purely spatial, but also logical and political. They could be relationships among things, texts, and photo-documents, but could also involve performances, happenings, films, and videos—all of which were shown inside the same installation space. In other words, conceptual art can be characterized as installation art—as a shift from the exhibition space presenting individual, disconnected objects to a holistic exhibition space in which the relations between objects are the basis of the artwork.